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BGP looking glass service is a well-known standard service for a global network diagnostic. Basically, itís related to BGP protocol, the main protocol of Internet Providers interconnection. It provides information about a certain route: how it is received by ISP, what is the length of this route, how many ISPs it goes through, what additional attributes it has and so on. In this article you can find the basics of global ISP interconnection and most important features of BGP Looking Glass service as well.
System administrators use very often "simple" IP addresses on the equipment for test purposes. E.g. address 188.8.131.52/24. Sounds like a big deal? No, it's just a random address that can be typed on the keyboard simply and quickly and is quite suitable for test purposes. And even if you read examples in the set up documentation you may often come across Router1 IP 184.108.40.206, Router 2 IP 220.127.116.11. However, the effect of such settings may be rather unexpected. For example, on March 23, 2018, the public DNS service from CloudFlare using the address 18.104.22.168 was disrupted. Let's see what about other "simple" addresses and prospects for their use.